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Distribution line tower span planning method based on load reliability

A distribution line and reliability technology, applied in the direction of electrical components, cable installation, electrical digital data processing, etc. question

Active Publication Date: 2017-02-08
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] When the above research results plan the power system, it does not involve the selection of line components, the determination of line spans and other specific line planning schemes, and the existing research results cannot be well applied to engineering practice.

Method used

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  • Distribution line tower span planning method based on load reliability
  • Distribution line tower span planning method based on load reliability
  • Distribution line tower span planning method based on load reliability

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Experimental program
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Embodiment Construction

[0110] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0111] Pole types such as figure 1 shown, for figure 2 The power distribution system shown is planned for spans and towers. The electrical parameters of the system components are shown in Table 1, and the average load of each load node is shown in Table 2:

[0112] Table 1 Feeder Length

[0113]

[0114] Table 2 Load parameters

[0115]

[0116]

[0117] Step 1: Calculation of pole load unreliability

[0118] 1.1 Calculate the bending strength of the pole

[0119] In the probability density function of the flexural strength of concrete poles, μ p =β·Mu=1.2Mu, δ p =ν·Mu=0.25Mu, so:

[0120] f R ( M p ) = 1 2 π 0.25 ...

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Abstract

The invention discloses a power distribution line tower span panning method based on load reliability. The randomness of the maximum wind velocities of typhoons and the frequency of typhoon landing are taken into account; an overhead power distribution line load reliability calculation model is built based on the type I distribution of the maximum wind velocity values of typhoons; with the whole life cycle cost of a power distribution system as a target function and a pole model number and a span length as decision variables, an overhead power distribution line tower and span planning model is built. The power distribution line tower span panning method based on the load reliability is characterized in that the tower and span planning model with the whole life cycle cost of the power distribution system as the target function and the line span as a constraint condition is built by taking the power interruption cost due to line pole collapse and breakage faults into account in combination with a tower investment cost and a maintenance cost. Based on the planning method, the planning personnel can control the load risk level of an overhead power distribution line visually, and the optimal scheme considering both economic efficiency and reliability can be obtained.

Description

technical field [0001] The invention belongs to the technical field of electric power system planning, and in particular relates to a method for planning the span of a power distribution line tower. Background technique [0002] The distribution network is located at the end of the power system, and the interests of users are closely related to the operation of the distribution network. However, because the wind-resistant design standard of the main network is often higher than the design standard of the distribution network, under typhoon or strong typhoon weather, coastal distribution lines are frequently downed and broken, resulting in the phenomenon of "strong main network and difficult power transmission in distribution network". Power outages caused by many wind disasters show that the power distribution network is poor in resisting typhoon and other disastrous weather. [0003] In 2008, the State Council's document "Several Opinions on Strengthening the Construction ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02G7/00G06F19/00
Inventor 胡博谢开贵兰颖余娟任洲洋李炎林马英浩
Owner CHONGQING UNIV
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